CN102337036A - Oxidized polyethlene wax-containing modified asphalt and preparation method thereof, and asphalt concrete - Google Patents
Oxidized polyethlene wax-containing modified asphalt and preparation method thereof, and asphalt concrete Download PDFInfo
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- CN102337036A CN102337036A CN2011102371125A CN201110237112A CN102337036A CN 102337036 A CN102337036 A CN 102337036A CN 2011102371125 A CN2011102371125 A CN 2011102371125A CN 201110237112 A CN201110237112 A CN 201110237112A CN 102337036 A CN102337036 A CN 102337036A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Abstract
The invention relates to modified asphalt and a preparation method thereof, and asphalt concrete. The modified asphalt comprises the following components in part by weight: 100 parts of petroleum asphalt, 3 to 5 parts of linear or branched Styrene butadiene styrene (SBS), 0.5 to 1.5 parts of oxidized polyethlene wax, 1 to 3 parts of compatilizer and 0.30 to 0.50 part of modified asphalt stabilizer. The ring-ball method softening point of the petroleum asphalt is 42-52DEG C, the 25DEG C penetration degree is 60-100, and the 10DEG C ductility is 80-150cm. The number-average molecular weight of the SBS is 90,000-300,000, and a ratio of styrene to butadiene is 28:72-40:60. The number-average molecular weight of the oxidized polyethlene wax is 1,000-5,000, and the acid value is 5-15mg kOH/g. The compatilizer is aromatic constituent-containing petroleum distillate, the 100DEG C kinematic viscosity is 30-50cst and the content of aromatic constituent is 75-100 percent. When the modified asphalt is used for constructing roads, the mixing temperature and paving temperature of the asphalt concrete can be greatly reduced, a great deal of fuel is saved, the emission of toxic flue gas in the construction process of the asphalt concrete is reduced, energy saving and emission reduction are facilitated, and the high temperature rutting resistance of the roads can be improved.
Description
Technical field
The present invention relates to road and use the polymer modified asphalt field, relate in particular to the modifying asphalt and this modified asphalt preparation method that contain OPE, and relate to the bituminous concrete that comprises this modifying asphalt.
Background technology
Since 1989 built article one motorway, the motorway of China had obtained development fast, has reached 6.5 ten thousand kilometers to the end of the year 2010, is only second to the U.S., occupies the 2nd in the world.The contact between the city has been strengthened in the fast-developing and construction of motorway, has promoted the cultural exchanges of different regions, has promoted the unity between the nationality, has shortened passenger-cargo time in transit, and important promoter action has been played in the development of whole national economy.Along with increasing and the raising of vehicle tyre air pressure of heavily loaded canalized traffic, rut has become one of early stage principal mode that damages of bituminous pavement.Especially on the long abrupt slope and the more mountain ridge hilling terrain motorway that takes a sudden turn; The loaded vehicle travel speed is slow; CL acts on the time lengthening on road surface, occurs the early stage phenomenons of damaging such as comparatively serious rut more easily, has a strong impact on that vehicle is normal, safety traffic.Be the early damage and the rutting resistance that improves the road surface of prevention motorway, the intensity that increases bituminous concrete is one of effective way.
The method that improves bituminous concrete intensity is both at home and abroad at present mainly set about from aspects such as raw-material selection, aggregate grading design, supercrust structure design, control of construction quality.To starting material selection aspect except selecting to adopt hard, coarse, shape near cubes, clean thick, fine aggregate that corner angle property is good, strong with asphalt adhesion gathering materials; Control natural sand consumption is no more than 10% etc., and on pitch is selected, selects the pitch that viscosity is higher, penetration degree is less, softening temperature is higher and wax content is lower for use or adopt additive to carry out modification.Facts have proved that the ability of resisting tension set through the bituminous of modification relatively obviously is superior to plain asphalt.In addition, some project is also added anti-rut agent, for example; The PR PLASTS of France; The TPS of Japan, the various anti-rut king that SAK (SASOBIT) series product and domestic manufacturer produce is exactly a kind of polymkeric substance that improves hot-mixed asphaltic concrete characteristic, especially its rutting resistance that is specifically designed to.
Along with the development of society, people to protection environment, energy-saving and emission-reduction require increasingly high.Concerning the Road construction industry, asphalt roads construction department particularly, traditional elevated temperature heat mix the asphalt concrete construction operation consumption big, pollute high, operation field and surrounding environment very severe, the warm-mixed asphalt concrete technology is flourish in recent years.So-called warm-mixed asphalt concrete (Warm Mix Asphalt; Be called for short WMA); Also claiming the warm-mixed asphalt technology, is through certain technical measures, and pitch can be mixed and stirred under relatively low temperature and construct; Keep it to be not less than the asphalt concrete technique of the use properties of hot-mixed asphaltic concrete (Hot Mix Asphalt is called for short HMA) simultaneously.The key of this technology be under the prerequisite of not damaging the HMA pavement performance, how to reduce pitch at a lower temperature mix and stir viscosity.At present, the international mainstream temperature technology of mixing mainly realizes through the high temperature viscosity of admixture reduction bituminous concrete.Simultaneously, advanced warm-mixed asphalt technology can make the warm-mixed asphalt concrete reach the performance of hot-mixed asphaltic concrete fully, and its lower temperature and compacting temperature of mixing and stirring, and it is compared with hot-mixed asphaltic concrete also have following advantage:
(1) reduced and mixed and stirred cost.Because mixing and stirring temperature generally can descend 10～30 ℃, building stones Heating temperature, asphalt thermal insulation temperature are with corresponding decline.So, fuel cost can descend 20%～50%, mixes and stirs and wraps difficulty and descend, and mixes and stirs the also corresponding decline of energy consumption and mechanical loss.
(2) reduced the bituminous concrete production energy consumption, alleviate agingly, improved pavement performance.With respect to hot-mixed asphaltic concrete, warm-mixed asphalt concrete mixing temperature has reduced by 10～30 ℃, is equivalent to produce 1 ton of asphalt and will saves 1～1.5kg fuel oil, and promptly bituminous concrete can be practiced thrift 30% energy consumption.The research demonstration, when temperature is higher than 100 ℃, 10 ℃ of the every raisings of asphalt temperature, its rate of ageing will improve 1 times, and the reduction of warm-mixed asphalt concrete work temperature has significantly reduced the catabiosis of bituminous concrete, thus can increase the work-ing life on road surface.
(3) reduced the quantity discharged of obnoxious flavour and dust, reduced environmental pollution, improved the working environment of workers quality.The fuel oil consumption of unit compound finished product reduces, and itself will significantly reduce the central obnoxious flavour of the process of mixing and stirring and the discharging of greenhouse gases.Owing to mix and stir decrease of temperature, bituminous concrete produces pitch smog dust pollution in mixing and stirring the whole process of on-the-spot compacting all can obviously reduce.In paving process, can realize not having the flue dust operation basically.Workman's labor condition is significantly improved, and infringement alleviates bituminous pavement to workers ' health.Simultaneously, compound mixes and stirs the physiological effect also significantly minimizing of bituminous pavement operation to road resident along the line.With the warm-mixed asphalt technology, heated fuel oil 20% to 30% can be saved in the road surface when construction, can make Carbon emission reduce 46%; Carbon monoxide reduces about 2/3; Sulfurous gas reduces 40%, and it is nearly 60% that nitrogen oxide type gas reduces, and deleterious " glance coal " that produce when paving; Can minimizing reach 80%, this has protected the healthy of environment and construction technical staff to a great extent.
(4) prolong construction seasons, increased handiness, the convenience of asphalt pavement construction.Because the material temperature is dwindled with the difference of envrionment temperature, rate of temperature fall descends in the concrete storage and transport process of warm-mixed asphalt, allows storage time and the equal significant prolongation of haulage time.The truck bottom produced bonding and the also significantly minimizing of compound sizing car phenomenon because of low temperature when the warm-mixed asphalt concrete was unloaded.
(5) equipment need not to transform and can produce.The warm-mixed asphalt concrete can all utilize existing hot-mixed asphaltic concrete equipment basically; Standard-required to satisfy hot-mixed asphaltic concrete is produced; And the finished product mixture performance is good, almost completely possesses construction workability the same with hot-mixed asphaltic concrete and pavement performance.
(6) rate of temperature fall slows down, but the compacting time significant prolongation of compound, and compacting is more secure; Simultaneously, be easier to corner and the manual operations of remedying the position; It is low relatively with the requirement of envrionment temperature that temperature is mixed the compound table that satisfies the need, and a pavement construction season and a day engineering time prolongation, specific heat is mixed and is more suitable for carrying on construction work at night.
(7) prolong bituminous concrete mixing apparatus work-ing life, reduce the equipment use cost.Because the reduction of production temperature to the also corresponding reduction of the loss of steely production unit, can prolong the equipment usage period in the compound production process, reduces cost; In addition, the concrete production of warm-mixed asphalt is got the raw materials ready or clout, all can store the long period flexibly and effectively, has increased throughput, has reduced the equipment loss of relevant producer; Equally, the product use range that pitch mixes and stirs producer also enlarges thereupon, and the warm-mixed asphalt concrete is in case laying is accomplished, and just can come into operation rapidly in the road surface, makes the duration in advance.
(8) open to traffic faster.Because after temperature was mixed compound completion compacting, its temperature had been in lower level, thereby the construction operation of open to traffic minimizing faster is to the interference of traffic after rolling completion.
Yet; The warm-mixed asphalt concrete technology does not obtain large-scale promotion in China at present; Its major cause is or the requirement that the performance on warm-mixed asphalt road surface does not also reach Hot-mix Bituminous Concrete Pavement; Like the concrete high temperature performance of some warm-mixed asphalt, anti-bad poor-performing of damage by water, or cost exceeds much than the traditional hot technology of mixing in implementing this technical process.
Therefore, be necessary to provide a kind of bituminous concrete to reduce the pavement construction cost, improve road surface high temperature rutting resistance and energy-saving and emission-reduction.
Summary of the invention
Be the rutting resistance of raising bituminous concrete road, the mix temperature of reduction modified asphalt concrete and the exhaust gas emission of pave temperature and minimizing modified asphalt concrete production and construction, the present invention provides a kind of modifying asphalt that reduces asphalt concrete construction cost, raising road surface high temperature rutting resistance and realize the asphalt concrete construction energy-saving and emission-reduction that is beneficial to.
This modifying asphalt by weight, comprises 100 parts in petroleum pitch, linearity or star-shaped sbs 3-5 part, OPE 0.5-1.5 part, compatilizer 1-3 part and modified asphalt stabilizer 0.30-0.50 part.The ring of this petroleum pitch and ball method softening temperature are 42 ℃-52 ℃, and 25 ℃ of penetration degrees are 60-100, and 10 ℃ of ductilities are 80-150cm.The number-average molecular weight of this SBS is at 90000-300000, and the ratio of its vinylbenzene and divinyl is 28: 72-40: 60.The number-average molecular weight of this OPE is at 1000-5000, and acid number is 5-15mgkOH/g.This compatilizer is to be rich in the petroleum fractions that fragrance divides, and its 100 ℃ of kinematic viscosity are 30-50cst, and fragrance divides content 75-100%.This stablizer is preferably the mixture of sulphur and Di Cumyl Peroxide 99, and wherein the weight ratio of sulphur and Di Cumyl Peroxide 99 is 40: 60-70: 30.
The present invention also provides a kind of modified asphalt preparation method.This preparation method comprises: by weight, mix 100 parts of these petroleum pitch and this compatilizer of 1-3 part, stir 5min-30min after being heated to 140-190 ℃; Add 3-5 part line style or star-shaped sbs and 0.5-1.5 part OPE, stir swelling 10-150min in 185-200 ℃; Add 0.30-0.50 part stablizer, grind 10-60min, stir developmental response 60min-240min down in 180-195 ℃ in 185-195 ℃ of down cut.
The present invention also provides a kind of bituminous concrete.This bituminous concrete comprises and gathering materials, breeze and aforementioned modifying asphalt.
Compared to traditional SBS modifying asphalt; The bituminous concrete of present technique scheme select with the petroleum pitch consistency preferably OPE as the part asphalt modifier; To add means such as physical compatibilizer, stablizer and mechanical stirring, shearing; Comprehensive utilization physics increase-volume and chemical reaction increase-volume principle; Realized under the condition that does not increase traditional SBS modifying asphalt cost, having improved the high temperature rutting resistance of modified asphalt concrete significantly, do not influenced the low-temperature performance of modified asphalt concrete simultaneously basically.And; Under the prerequisite that does not change traditional SBS modified asphalt concrete mix method, reduced the mix temperature of bituminous concrete and the temperature that paves by a relatively large margin, can practice thrift great amount of fuel oil; Reduce the discharging of the poison gas in the asphalt concrete construction process, thereby realized energy-saving and emission-reduction.
Embodiment
Below will combine specific embodiment to specify modifying asphalt that the present technique scheme provides and preparation method thereof, and environment-friendly and energy-efficient and have high-intensity bituminous concrete.
Embodiment 1
Present embodiment provides a kind of modified asphalt preparation method that contains OPE.This method may further comprise the steps:
The first step: use compatilizer mediation matrix pitch.
This matrix pitch can be commercially available bi tumenf orr oad.In the present embodiment, select commercially available No. 70 bi tumenf orr oad A for use, its softening temperature is 47 ℃, and 25 ℃ of penetration degrees are 72 (0.1mm), and 10 ℃ of ductilities are＞100cm.
Said compatilizer can be commercially available common furfural extract oil.Preferably, 100 ℃ of kinematic viscosity 30-50cst of this compatilizer, by weight percentage, fragrance divides content 75-100%.Select for use commercially available Iran to produce aromatic hydrocarbon oil in the present embodiment, its 100 ℃ of kinematic viscosity 35cst, fragrance divides content 91.27%.
This compatilizer is in harmonious proportion matrix pitch and comprises: in weight ratio, mixes 100 parts of this commercially available No. 70 road bitumen A and should Iran produce aromatic hydrocarbon oil with 2 parts, and stirring 5 to 30min under 140 ℃-190 ℃, get the pitch temper.
Second step: swelling SBS and OPE in this pitch temper.
Said SBS is commercially available common line style or star-shaped sbs.The number-average molecular weight of the commercially available SBS that selects for use in the present embodiment is about 110000, and the ratio of vinylbenzene and divinyl is 30: 70 in the molecule, and constitutional features is a line style.
Said OPE is commercially available common OPE.Preferably, the number-average molecular weight of this OPE is at 1000-5000, acid number: 5-15mgkOH/g.The number-average molecular weight of the OPE that present embodiment is selected for use is about 1500, and acid number is 9mgkOH/g.
Said SBS and the OPE swell process in this pitch temper comprises: in weight ratio, get 102 parts of said pitch tempers, add 1 part of 3.5 parts of SBS791H and OPE, temperature is risen to 180 ℃-190 ℃, stir to dissolve and open a 60min.
The 3rd step: add stablizer, shear.
Said stablizer can be commercially available this area petroleum pitch stablizer commonly used.In the present embodiment, this stablizer is the mixture of commercially available sulphur and Di Cumyl Peroxide 99 (DCP).Wherein, the weight ratio of sulphur and DCP is 45: 55.Shearing technology behind the said interpolation stablizer comprises: in weight ratio, get 106.5 parts in the second step gained modifying asphalt mixture, add 0.35 part of stablizer after, at 190 ℃ of down cut 30min.
The 4th step: stir and grow.
The speed of this stirring should not be too soon or is too slow.If it is too slow to grow stirring velocity, then the developmental capacity of modifying asphalt is bad; If it is too fast to stir development rate, then the volatilization of bituminous light constituent is very fast, and is unfavorable to the low-temperature ductility (5 ℃ of ductilities) of modifying asphalt.Preferably, this stirring development rate is 30-100rpm.The time that this stirring is grown is 60-240min, preferably stirs development time 90-180min.In the present embodiment, the stirring development rate is 60rpm, and the stirring development time is 120min, and this stirring developmental temperature remains between 185-190 ℃.
Be appreciated that by weight the modifying asphalt that present embodiment makes comprises 0.35 part of No. 70 bi tumenf orr oad A100 parts, 3.5 parts of type SBS 791H, 1 part of OPE, 2 parts of compatilizers and stablizer.
Embodiment 2
Compare with embodiment 1, in the present embodiment, 0.5 part of 4.0 parts of SBS791H and OPE, other steps and processing parameter are same as embodiment 1.
Be appreciated that by weight the modifying asphalt that present embodiment makes comprises 0.35 part of No. 70 bi tumenf orr oad A100 parts, 4.0 parts of type SBS 791H, 0.5 part of OPE, 2 parts of compatilizers and stablizer.
Embodiment 3
Compare with embodiment 1, in the present embodiment, 1.5 parts of 3.0 parts of SBS791H and OPEs, other steps and processing parameter are same as embodiment 1.
Be appreciated that by weight the modifying asphalt that present embodiment makes comprises 0.35 part of No. 70 bi tumenf orr oad A100 parts, type SBS 791H3.0 part, 1.5 parts of OPEs, 2 parts of compatilizers and stablizer.
The comparative example
Compare with embodiment 1, among this comparative example, 0 part of 4.5 parts of SBS791H and OPE, other steps and processing parameter are same as embodiment 1.
Be appreciated that by weight the modifying asphalt that this comparative example makes comprises 0.35 part of No. 70 bi tumenf orr oad A100 parts, 4.5 parts of type SBS 791H, 2 parts of compatilizers and stablizer.
The composition and performance of the modifying asphalt that each embodiment of table 1 makes
The modifying asphalt that the present technique scheme provides can be used for preparing various dense-graded asphalt concretes, in this, is that example explains that this modifying asphalt is in the road Application for Field with preparation close-graded AC-16 bituminous concrete only.
Get the modifying asphalt that aforementioned each embodiment of equivalent makes respectively, by identical proportioning, with every part of modifying asphalt with gather materials, breeze mixes, and adopts conventional process in the industry, processes close-graded AC-16 bituminous concrete test specimen.Wherein, this gathers materials and this breeze adopts the Guangzhou Fanyu District to produce Wingdale rubble and breeze, the quality examination data of the two are seen table 2, table 3.The grating situation of this bituminous concrete test specimen is seen table 4.The performance of this bituminous concrete test specimen is seen table 5.
Each embodiment aggregate quality achievement data of table 2
Table 3 powdered ore quality desired value
The composition of table 4 close-graded AC-16 bituminous concrete test specimen
The physical size index and the pavement performance of table 5 close-graded AC-16 bituminous concrete test specimen
Annotate: said standard refers to asphalt highway construction technique normalizing (JTG F40-2004)
Can know from table 5; When the modifying asphalt that provides with various embodiments of the present invention is processed close-graded AC-16 bituminous concrete marshal piece, hit real temperature and all descend at least 10 ℃, accordingly than the comparative example; The Heating temperature of gathering materials, the Heating temperature of modifying asphalt, concretely mix and stir temperature and the temperature that paves all will descend significantly; Can practice thrift mass energy consumption thus, reduce waste discharge, thereby realize reducing asphalt concrete construction cost and energy-saving and emission-reduction.And; The bituminous concrete test specimen that various embodiments of the present invention make is after maintenance under 60 ℃ of conditions of standard temperature; The dynamic stability that employing standard wheel load is measured all increases substantially, and reflects that the high temperature rutting resistance is significantly improved, and low-temperature performance is unaffected basically simultaneously.
What deserves to be mentioned is that each components contents of modifying asphalt provided by the invention is not limited to aforementioned each embodiment.Those skilled in the art can regulate each component of this modifying asphalt according to the actual requirements in following ratio; By weight, this modifying asphalt can comprise 100 parts in petroleum pitch, linearity or star-shaped sbs 3-5 part, OPE 0.5-1.5 part, compatilizer 1-3 part, modified asphalt stabilizer 0.30-0.50 part.
Claims (6)
1. modifying asphalt; By weight; Comprise 100 parts in petroleum pitch, line style or star-shaped sbs 3-5 part, OPE 0.5-1.5 part, compatilizer 1-3 part and modified asphalt stabilizer 0.30-0.50 part, wherein, the ring of this petroleum pitch and ball method softening temperature are 42 ℃-52 ℃; 25 ℃ of penetration degrees are 60-100, and 10 ℃ of ductilities are 80-150cm; The number-average molecular weight of this SBS is at 90000-300000, and the ratio of its vinylbenzene and divinyl is 28: 72-40: 60; The number-average molecular weight of this OPE is at 1000-5000, and acid number is 5-15mgkOH/g; This compatilizer is to be rich in the petroleum fractions that fragrance divides, and its 100 ℃ of kinematic viscosity are 30-50cst, and fragrance divides content 75-100%.
2. modifying asphalt as claimed in claim 1 is characterized in that, this stablizer is the mixture of sulphur and Di Cumyl Peroxide 99, and wherein the weight ratio of sulphur and Di Cumyl Peroxide 99 is 40: 60-70: 30.
3. modified asphalt preparation method comprises:
By weight, mix 100 parts of petroleum pitch and 1-3 part compatilizer, stir 5min-30min after being heated to 140-190 ℃, the ring of this petroleum pitch and ball method softening temperature are 42 ℃-52 ℃, and 25 ℃ of penetration degrees are 60-100, and 10 ℃ of ductilities are 80-150cm; This compatilizer is to be rich in the petroleum fractions that fragrance divides, and its 100 ℃ of kinematic viscosity are 30-50cst, and fragrance divides content 75-100%;
Add 3-5 part line style or star-shaped sbs and 0.5-1.5 part OPE, in 185-200 ℃ of stirring swelling 10-150min, the number-average molecular weight of this SBS is at 90000-300000, and the ratio of its vinylbenzene and divinyl is 28: 72-40: 60; The number-average molecular weight of this OPE is 1000～5000, acid number: 5～15mgkOH/g;
Add 0.30-0.50 part stablizer, grind 10-60min, stir developmental response 60min-240min down in 180-195 ℃ in 185-195 ℃ of down cut.
4. modified asphalt preparation method as claimed in claim 3 is characterized in that, this stablizer is the mixture of sulphur and Di Cumyl Peroxide 99, and the weight ratio of this sulphur and Di Cumyl Peroxide 99 is 40: 60-70: 30.
5. bituminous concrete; Comprise gather materials, breeze and modifying asphalt, this modifying asphalt comprises 100 parts in petroleum pitch, line style or star-shaped sbs 3-5 part, OPE 0.5-1.5 part, compatilizer 1-3 part and modified asphalt stabilizer 0.30-0.50 part by weight; Wherein, The ring of this petroleum pitch and ball method softening temperature are 42 ℃-52 ℃, and 25 ℃ of penetration degrees are 60-100, and 10 ℃ of ductilities are 80-150cm; The number-average molecular weight of this SBS is at 90000-300000, and the ratio of its vinylbenzene and divinyl is 28: 72-40: 60; The number-average molecular weight of this OPE is at 1000-5000, and acid number is 5-15mgkOH/g; This compatilizer is to be rich in the petroleum fractions that fragrance divides, and its 100 ℃ of kinematic viscosity are 30-50cst, and fragrance divides content 75-100%.
6. bituminous concrete as claimed in claim 5 is characterized in that, this stablizer is the mixture of sulphur and Di Cumyl Peroxide 99, and wherein the weight ratio of sulphur and Di Cumyl Peroxide 99 is 40: 60-70: 30.
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| CN109385106A (en) * | 2018-09-30 | 2019-02-26 | 广东粤运佳富实业有限公司 | Low viscous high performance modified bitumen of one kind and preparation method thereof |
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